<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>边框复合写法</title>
    <style>
        div {
            width: 600px;
            height: 300px;
            /* border-width: 5px;
            border-style: solid; */
            background-color: pink;
              /* 简写 无先后顺序 通俗约定顺序如下 */
              border:5px solid 
        }
       

    </style>
</head>
<body>
    <div></div>
    
</body>
</html>